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package lab8;

public abstract class Operator extends Nod{

    @Override
  public  double calcul()
  {
  return 0;
  }
public abstract double calcul(double aux1 , double aux2);
public abstract String concatTermeni(String aux1,String aux2);
    
  public String toString()
        {
        String s1= fStang.toString();
        String s2= fDrept.toString();
        return concatTermeni(s1,s2);
        }
    
    
}
